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首页> 外文期刊>Advanced Functional Materials >Fully Chiral Light Emission from CsPbX_3 Perovskite Nanocrystals Enabled by Cholesteric Superstructure Stacks
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Fully Chiral Light Emission from CsPbX_3 Perovskite Nanocrystals Enabled by Cholesteric Superstructure Stacks

机译：胆甾型超结构堆栈实现CsPbX_3钙钛矿纳米晶体的完全手性发光

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摘要

Halide perovskites have received tremendous attention due to their fantastic optical and electrical properties. Here, circularly polarized light emission is successfully demonstrated using a simple configuration consisting of inorganic perovskite nanocrystals embedded within a predefined handedness cholesteric superstructure stack. The helical structured cholesteric liquid crystal film acts as a selective filter to transform the unpolarized light emission from perovskite nanocrystals into circularly polarized luminescence. The transformation is accompanied by an extraordinary dissymmetry factor (|g(lum)|) up to 1.6, well-defined handedness, high photoluminescence quantum yield, and full-color availability. Furthermore, the circularly polarized luminescence is angular dependent and can easily be modulated by shifting the overlap of the reflection band and the emission band. The proposed method is more straightforward and powerful than the previous approaches, offering new opportunities in optoelectronic and photonic devices.
机译：卤化物钙钛矿因其出色的光学和电学性能而受到了极大的关注。在这里，圆偏振光的发射是通过使用简单的配置成功地证明的，该配置由嵌入预定的手性胆甾型超结构堆栈中的无机钙钛矿纳米晶体组成。螺旋结构的胆甾型液晶膜用作选择性滤光片，以将钙钛矿纳米晶体的非偏振光发射转换为圆偏振发光。该变换伴随着高达1.6的非对称系数（| g（lum）|），明确的惯用性，高的光致发光量子产率和全色可用性。此外，圆偏振发光与角度有关，并且可以通过改变反射带和发射带的重叠来容易地进行调制。所提出的方法比以前的方法更直接，更强大，为光电和光子设备提供了新的机会。

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